Classification
120 - Epistemology, causation & humankind
530 - Physics
700 - The arts; fine & decorative arts
100 - Philosophy & psychology
3
170 - Ethics
3
140 - Specific philosophical schools
2
200 - Religion
2
340 - Law
2
600 - Technology
2
160 - Logic
1
300 - Social sciences
1
304 - Factors affecting social behavior
1
333 - Economics of land & energy
1
370 - Education
1
500 - Natural sciences & mathematics
1
551 - Geology, hydrology & meteorology
1
580 - Plants (Botany)
1
900 - History & geography
1